Deutsch: Reibahle / Español: Escariado / Français: Alêsoir / Italiano: Alesatore

A reamer is a type of rotary cutting tool used in metalworking. Precision reamers are designed to enlarge the size of a previously formed hole by a small amount but with a high degree of accuracy to leave smooth sides. There are also non-precision reamers which are used for more basic enlargement of holes or for removing burrs. The process of enlarging the hole is called reaming.

In the industrial and industry context, a reamer is a cutting tool used to enlarge, smooth, or shape a hole that has already been drilled or punched into a workpiece. Reamers are designed to remove small amounts of material from the inside surface of a hole with a high degree of accuracy and surface finish.

Examples of reamers in industrial and industry include:

  • Hand reamers used for manual reaming operations in a variety of materials
  • Machine reamers used for automated reaming operations in drilling machines and CNC machines
  • Taper reamers used for reaming holes to a specific taper or angle
  • Straight reamers used for reaming cylindrical holes
  • Spiral reamers used for reaming holes with a helical flute pattern
  • Chucking reamers used for reaming holes in small or thin parts
  • Coolant-fed reamers used for reaming operations with coolant or lubricant for improved performance and tool life
  • Adjustable reamers used for reaming holes to a specific size within a range of sizes.


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